What It Means
Hard lockout active due to repeated or severe fault.
Trane AC & Heat Pump
Trane AC & Heat Pump Error Code Green LED
(Intermittent Flash – 1 flash every 4 sec)
Troubleshooting guide for the Trane AC & Heat Pump system fault Green LED (Intermittent Flash – 1 flash every 4 sec).
ACLogics Fix Trane code Green LED (Intermittent Flash – 1 flash every 4 sec) See how ACLogics handles it → Fix Green LED (Intermittent Flash – 1 flash every 4 sec) step-by-step
Possible Causes
- High or low pressure switch trip.
- Severe system fault requiring manual power reset.
Not sure which one it is — or if it's none of these? Try ACLogics today.
Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
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Full Diagnosis
Hard lockout active.
All Recorded Causes
The system is locked out due to a serious fault (e.g. high/low pressure). The red LED will flash the specific error code; power cycling is usually required to reset after resolving the issue.
Verify Before Replacing Parts
- Confirm the exact Trane model family and ac and heat pump context before acting on a generic code description.
- Verify airflow first, then confirm operating pressures and temperature relationship before adjusting charge, since the system is locked out due to a serious fault (e.g.
- Look for restrictions, iced coils, or dirty heat-transfer surfaces that can mimic a charge problem, and separately confirm high/low pressure).
- After the correction, run the system long enough to confirm the ac and heat pump fault does not return under normal load.
Not sure which system this Trane code is on?
ACLogics has guided diagnostics for 36 Trane fault codes and asks the right questions to narrow it down.
